27991047

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^2\times {\mathrm{73}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 47028480

約数和(自身を除く): 19037433

約数列:

[1, 3, 7, 19, 21, 31, 57, 73, 93, 133, 217, 219, 399, 511, 589, 651, 961, 1387, 1533, 1767, 2263, 2883, 4123, 4161, 6727, 6789, 9709, 12369, 15841, 18259, 20181, 29127, 42997, 47523, 54777, 70153, 127813, 128991, 210459, 300979, 383439, 491071, 902937, 1332907, 1473213, 3998721, 9330349, 27991047]

約数ペア:

[(1, 27991047), (3, 9330349), (7, 3998721), (19, 1473213), (21, 1332907), (31, 902937), (57, 491071), (73, 383439), (93, 300979), (133, 210459), (217, 128991), (219, 127813), (399, 70153), (511, 54777), (589, 47523), (651, 42997), (961, 29127), (1387, 20181), (1533, 18259), (1767, 15841), (2263, 12369), (2883, 9709), (4123, 6789), (4161, 6727)]